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' E. M. HAMILTON.

LEVER MOVEMENT FORTYPE WRITERS. No. 357,668. Patented-Feb. 15, 1887.

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' UNITED STATES V EMERY M. HAMILTON,

on NEW YORK, N. Y.

LEVER-MOVEM ENT FOR TYPE-WRITERS.

SPECIFICATION forming part of Letters Patent N 0. 357,668, datedFebruary 15, 1887. Application filedApril 1,1856. 'llenewed December 2,1886, Srrial No. 220,519. {No model.)

To all whom it may concern:

Be it known that I, EMERY M. HAMILTON, of the city of New York, in thecounty and State of New York, and a citizen of the United States ofAmerica,.have invented anew and useful Lever-Movement for Type-WVriters,of which the following is a specification, refer ence being had to theaccompanying drawings, forming part of the same, in which Figure l is aside elevation, partly in section, and Fig. 2 a plan or top view, of theparts constituting a lever-movement that embodies my invention. Fig. 3is also aside elevation, partly in section, of the same device, showingthe lever in a position different from that shown in Fig. 1; and Fig. 4represents amodification of the key-board and its connections.

The purpose of the lever herein shown and described is to support andmove the printingtype in a type-printing machine, so that the type islifted from an inking-pad and carried to the point where the impressionis to be made on the paper and pressed against the paper and thenreturned to the said pad by a single vibration of the key-lever; and theinvention consists in the combination, hereinafter described andclaimed, of a type-lever carrying a printing-type and arranged to rockand slide 011 a fixed fulcrum, a rock-shaft and single crank arm fromwhich motion is communicated to said lever, a printingtable, and afinger-key, and the described connections with the rock-shaft whereby,in conjunction with a spring, a rocking motion may be given to therock-shaft.

A is the type-lever. B is a crank fixed on a rock-shaft, O, that isjonrnaled in suitable uprights, as at a a. The said lever and crank arejointed together; as at b, and c is a keeper or staple fixed in asuitable support, as at d, and through which the lever A passes. Itforms the fulcrum of the said lever.

D is a finger or key lever, hinged at its inner end, as at e, andprovided at its opposite end with a finger-piece, f.

A is a table upon which the parts are mounted.

g is a band, one end of which is connected to the crank B, as at g, andthe opposite end to the key-lever D, as at the said belt passing fromits connection down over the inner face of the shaft 0.

h is another belt, connected at one end also to the crank B, as at g,and,passing down over the opposite or outer face of the shaft 0, isconnected atilslower end to a spring, E,which acts through the said beltto rock the said shaft and its attached crank in a direction reversefrom that given to it by the key-lever D, through the belt 9, and intothe position shown in Fig. 1.

F is intended to represent a section of an inking-pad for inking thetype j, fixed in the end of the lever A, and G indicates a section of aplaten, against which the type on the end of the lever is pressed togive the printing-impression upon paper to belaid against the face ofthe said platen.

The operation of the described lever movement is obvious. Fig. 1 showsthe same in the normal position, at rest. Now, when the keylever D isdepressed by pressing on the fingerpiece f the shaft 0 is rocked on itsbearings and the crank B makes a half-revolution, or nearly so,into theposition shown by the dotted lines at B. Vhile the crank is making thismovement the free end of the lever A, carrying the type j, describes thecurve shown by the dotted line at 75, whereby the type at the beginningof the movement is carried directly or nearly directly downward, awayfrom the inking-pad, and at the end of the movement directly upwardagainst the platen for making the printing-impression. Then, when thekeylever D is released, the spring E acts to rotate the crank in theopposite direction, reversing the movement of the lever A and bringingthe type back into contact with the inking-pad.

Fig. 4 shows a modification of the key-lever which I regard as theequivalent of that shown in the other figures, and which may be used ifpreferred. It consists of apost or shaft, m, arranged to slidevertically in suitable supports, and to the lower end of which the beltor band 9 is attached and the upper end of which is provided with afinger-piece, f. It is obvious that by depressing this post the sameeffect will be produced as by depressing the key-lever D.

As before intimated, the described levermovement is especially designedand adapted to operate the type in a type-writing machine in which aseries of levers is employed, each one carrying a type. In such amachine the series of these type-levers may be arranged in a plane in acircle and radiating outward from the type ends, so that each lever,whenactuated by the depression of the type-lever, will carry the type to thecenter of the circle.

By reversing the position on the shaft 0 of the bands 9 and h, it isobvious that the movement of the lever A may be reversed, so that whenthe lever A is at rest under the stress of the spring E its type endwould lie in contact with the platen G, and the manipulation of thekey-lever would carry the type from that position outward to the placeof the pad F and back again to the platen. Such an arrangement would notbe suitable for a machine in which the type-levers are arranged in acircle and the printing is done at the center of such circle; but thedescribed lever-movement is also adapted to the use of a single lever togive repeated impressions with a single type, or the use of a series ofsuch levers arranged side by side parallel to each other, and when thusused the described reverse movement may be adopted, the positions .ofthe inking-pad and platen being also reversed.

I am aware that vibrating and reciprocating type-levers have been usedin type-writing machines, to which motion has been communicated invarious ways and by various devices for both inking the type and makingthe printing-impression. I do not therefore claim, broadly, such alever-movement, but limit my claim to the special devices andcombination claimed.

What I claim as my invention, and desire to secure by Letters Patent,is-

The combination of thetype-lever A,adapted to carry at its free end aprinting type, afixed fulcrum, c, rock-shaft 0, single crank-arm B,secured on said shaft and hinged to said lever, 40 with the describedmeans for rocking said shaft, as and for the purpose set forth.

EMERY M. HAMILTON.

Witnesses:

A. G. N. VERMILYA, A. S. FITCH.

